CN104458273B - The poor stall threshold establishing method of gas turbine safe operation - Google Patents
The poor stall threshold establishing method of gas turbine safe operation Download PDFInfo
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- CN104458273B CN104458273B CN201410586814.8A CN201410586814A CN104458273B CN 104458273 B CN104458273 B CN 104458273B CN 201410586814 A CN201410586814 A CN 201410586814A CN 104458273 B CN104458273 B CN 104458273B
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000002485 combustion reaction Methods 0.000 claims abstract description 49
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 239000000446 fuel Substances 0.000 claims abstract description 28
- 230000014509 gene expression Effects 0.000 claims abstract description 20
- 238000002474 experimental method Methods 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 12
- 238000000605 extraction Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 30
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 5
- 241000208340 Araliaceae Species 0.000 description 3
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 3
- 235000003140 Panax quinquefolius Nutrition 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 235000008434 ginseng Nutrition 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
The present invention relates to gas turbine technology field, specifically disclose a kind of poor stall threshold establishing method of gas turbine safe operation, it is included in the poor flame-out experiment done on the poor flame-out pilot combustion channel in combustion chamber under at least three operating modes, the combustion chamber inlet air load parameter and fuel load parameter when stopping working under each operating condition of test are recorded respectively, the poor blowoff limit under each operating condition of test is calculated respectively, the poor blowoff limit that airload parameter under each operating condition of test and calculating are obtained brings poor blowoff limit expression formula into, calculate the constant in poor blowoff limit expression formula under each operating condition of test, obtained constant will be calculated under each operating condition of test and asks for arithmetic mean of instantaneous value, poor blowoff limit of the gas-turbine combustion chamber under all other operating mode is estimated using poor flame-out expression formula, according to the poor blowoff limit estimated, set poor stall threshold of the gas turbine under whole operating modes.The present invention can set out the poor stall threshold in combustion chamber, so as to ensure that the safe operation of gas turbine.
Description
Technical field
The present invention relates to gas turbine technology field, more particularly to a kind of poor stall threshold setting of gas turbine safe operation
Method.
Background technology
Heavy duty gas turbine is sent out to directions such as bigger single-machine capacity, higher cycle efficieny and lower discharges
Exhibition.Important function is born as one of three big core components of heavy duty gas turbine in combustion chamber.On the one hand it needs to fire
The chemical energy of material effectively discharges the combustion gas for being converted to HTHP, and for it, expansion work provides condition in turbine；Separately
On the one hand, he is also responsible for controlling the generation of pollutant.Attention with the whole world to environmental issue, various countries are to heavy duty gas turbine
The emission request of combustion chamber is more and more stricter, the requirement especially discharged to nitrogen oxides (NOx).Therefore, in design and development
During heavy duty gas turbine of new generation, each major gas turbine manufacturer is mostly using poor premix combustion with reduced pollutants designing technique.
Poor premixed combustion means that combustion chamber must work under relatively low oil-gas ratio, namely gas turbine is poor flame-out
Worked near (or lean blowout) border, which adds the poor flame-out risk in combustion chamber.In order to ensure the peace of gas turbine
Row for the national games, it is necessary to more accurately estimate the poor blowoff limit of gas-turbine combustion chamber, then sets necessarily according to poor border of putting out
Threshold value, so as to ensure the safe operation of combustion engine.
In the prior art, it refer in Patent No. CN101493230A patent a kind of via the control of nozzle equivalent proportion
Combustion lean-blowout protection method, this method be mainly by by the nozzle equivalent proportion of measurement with setting threshold value compared after,
Then take certain control strategy to avoid the poor flame-out generation of gas turbine, but do not propose how the poor flame-out threshold of setting
Value.And in the practical work process of combustion engine, the setting of the threshold value is extremely important, the safety fortune of gas turbine is directly connected to
OK.
The content of the invention
(1) technical problem to be solved
It is an object of the invention to provide a kind of poor stall threshold establishing method of gas turbine safe operation, to overcome existing skill
The problem of poor stall threshold of combustion chamber can not be set in art.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of poor stall threshold setting side of gas turbine safe operation
Method, comprises the following steps：
S1. the poor flame-out experiment under at least three operating modes is done on the poor flame-out pilot combustion channel in combustion chamber；
S2. the combustion chamber inlet air load parameter and fuel load ginseng when stopping working under each operating condition of test are recorded respectively
Number；
S3. the poor blowoff limit under each operating condition of test is calculated respectively；
S4. the poor blowoff limit obtained the airload parameter under each operating condition of test and calculating is brought into poor
Blowoff limit expression formula, calculates the constant in poor blowoff limit expression formula under each operating condition of test；
S5. the obtained constant will be calculated under each operating condition of test and asks for arithmetic mean of instantaneous value；
S6. poor blowoff limit of the gas-turbine combustion chamber under all other operating mode is estimated using poor flame-out expression formula；
S7. according to the poor blowoff limit estimated, poor stall threshold of the setting gas turbine under whole operating modes.
Preferably, the airload parameter includes air mass flow, air themperature and air pressure, the fuel load ginseng
Number includes fuel flow rate, fuel temperature and fuel pressure.
Preferably, the poor blowoff limit in step S3 under each operating mode is obtained by equation below,
Wherein, qlboFor poor blowoff limit, mfFor fuel flow rate, maFor air mass flow.
Preferably, poor blowoff limit expression formula is as follows in step S4,
Wherein, P3For air pressure, T3For air themperature, K is constant.
Preferably, the arithmetic mean of instantaneous value of constant is asked for by equation below described in step S5,
Wherein,For the arithmetic mean of instantaneous value of the constant, N is the number of operating condition of test.
Preferably, poor flame-out expression formula is as follows in step S6,
Wherein, q 'lboFor the poor blowoff limit estimated.
Preferably, poor stall threshold of the gas turbine under whole operating modes is set by equation below in step S7,
qset=Cq 'lbo
Wherein, qsetFor poor stall threshold, C is threshold coefficient, and the span of the threshold coefficient is 1.5~3.0.
Preferably, it is characterised in that the poor flame-out pilot combustion channel in combustion chamber includes air supply system, fuel and supplied
System, airload parameter measurement instrument, fuel load parameter measurement instrument, full-size combustor, delivery temperature measuring instrumentss
And gas extraction system.
Preferably, the airload parameter measurement instrument and fuel load parameter measurement instrument include flowmeter, heat
Galvanic couple and pressure transmitter.
(3) beneficial effect
The poor stall threshold establishing method of gas turbine safe operation of the present invention can be by trying combustion chamber at least three
Test operating mode and carry out measurement and calculating etc. accordingly, the poor stall threshold in combustion chamber is set out, so as to ensure that the safety of gas turbine
Operation.
Brief description of the drawings
Fig. 1 is the flow chart of the poor stall threshold establishing method of gas turbine safe operation of the embodiment of the present invention；
Fig. 2 is the structured flowchart of the poor flame-out pilot combustion channel in combustion chamber of the embodiment of the present invention.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
The principle of the poor stall threshold establishing method of gas turbine safe operation of the present invention is as follows：Gas turbine is determined first
The poor blowoff limit of combustion chamber, a threshold coefficient is then multiplied by the basis of poor blowoff limit and is just completed to poor flame-out threshold
The setting of value.
The determination of the poor blowoff limit of gas-turbine combustion chamber mainly has two methods to obtain：(1) Lefebvre half
Rule-of-thumb relation method；(2) numerical simulation is combined method with Lefebvre semi-empirical relations.First method because it is convenient,
Fast, it is widely used in combustion chamber conceptual phase；Second method is applied in the optimization design of combustion chamber sometimes, but
The precision of prediction of this method is higher to the degree of dependence of semi-empirical relation, and because numerical computations are difficult to transition state in itself
Problem is carried out compared with accurate simulation, and institute does not almost have universality also in this way.For certain sizing combustion chamber, work as use
When Lefebvre semi-empirical relation French methods estimate poor blowoff limit, only it need to determine that the general constant in the relational expression can be right
Poor blowoff limit of the combustion chamber under other operating modes is carried out compared with Accurate Prediction, and precision can typically reach ± 30%.So, to protect
Demonstrate,prove and the accurate of poor blowoff limit under gas-turbine combustion chamber other operating condition of test is estimated, it is necessary to carry out under several different operating modes more
The poor flame-out experiment of burning, to obtain degree of precision Lefebvre relational expression general constants；In order to ensure gas turbine in reality
Operating safe operation, additionally needs the poor blowoff limit of prediction being multiplied by a threshold safety coefficient, so as to complete poor put out
The setting of fiery threshold value.
As shown in figure 1, the poor stall threshold establishing method of the gas turbine safe operation of the present embodiment comprises the following steps：
S1. the poor flame-out experiment under at least three operating modes is done on the poor flame-out pilot combustion channel in combustion chamber.
S2. the combustion chamber inlet air load parameter and fuel load ginseng when stopping working under each operating condition of test are recorded respectively
Number；
The airload parameter includes air mass flow, air themperature and air pressure, and the fuel load parameter includes
Fuel flow rate, fuel temperature and fuel pressure.
S3. the poor blowoff limit under each operating condition of test is calculated respectively；
Poor blowoff limit under each operating mode is obtained by equation below,
Wherein, qlboFor poor blowoff limit, mfFor fuel flow rate, maFor air mass flow.
S4. the poor blowoff limit obtained the airload parameter under each operating condition of test and calculating is brought into poor
Blowoff limit expression formula, calculates the constant in poor blowoff limit expression formula under each operating condition of test；
Poor blowoff limit expression formula is as follows,
Wherein, P3For air pressure, T3For air themperature, K is constant.
S5. the obtained constant will be calculated under each operating condition of test and asks for arithmetic mean of instantaneous value；
The arithmetic mean of instantaneous value of the constant is asked for by equation below,
Wherein,For the arithmetic mean of instantaneous value of the constant, N is the number of operating condition of test.
S6. poor blowoff limit of the gas-turbine combustion chamber under all other operating mode is estimated using poor flame-out expression formula；
Poor flame-out expression formula is as follows,
Wherein, q 'lboFor the poor blowoff limit estimated.
S7. according to the poor blowoff limit estimated, poor stall threshold of the setting gas turbine under whole operating modes.
Poor stall threshold of the gas turbine under whole operating modes is set by equation below,
qset=Cq 'lbo
Wherein, qsetFor poor stall threshold, C is threshold coefficient, and the span of the threshold coefficient is 1.5~3.0.
As shown in Fig. 2 the poor flame-out pilot combustion channel in combustion chamber includes：Air supply system, fuel feed system, sky
Gas load parameter measuring instrumentss, fuel load parameter measurement instrument, full-size combustor, delivery temperature measuring instrumentss and exhaust system
System.
Airload parameter measurement instrument and fuel load the parameter measurement instrument includes：Flowmeter, thermocouple and
Pressure transmitter.
In the present embodiment, above-mentioned steps S1 and step S2 is completed on the poor flame-out pilot combustion channel in the combustion chamber, is stopped working
Determined according to the catastrophe point of combustor exhaust temperature.
The poor stall threshold establishing method of gas turbine safe operation of the present invention can be by trying combustion chamber at least three
Test operating mode and carry out measurement and calculating etc. accordingly, the poor stall threshold in combustion chamber is set out, so as to ensure that the safety of gas turbine
Operation.
Embodiments of the invention are provided for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be more preferably to illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to design the various embodiments with various modifications suitable for special-purpose.
Claims (6)
1. a kind of poor stall threshold establishing method of gas turbine safe operation, it is characterised in that comprise the following steps：
S1. the poor flame-out experiment under at least three operating condition of test is done on the poor flame-out pilot combustion channel in combustion chamber；
S2. the combustion chamber inlet air load parameter and fuel load parameter when stopping working under each operating condition of test are recorded respectively；
S3. the poor blowoff limit under each operating condition of test is calculated respectively；
S4. the poor blowoff limit that the airload parameter under each operating condition of test and calculating are obtained is substituted into poor flame-out
Boundary expressions, calculate the constant in poor blowoff limit expression formula under each operating condition of test, the poor blowoff limit expression formula is such as
Under,
Wherein, qlboFor poor blowoff limit, maFor air mass flow, P3For air pressure, T3For air themperature, K is constant；
S5. the obtained constant will be calculated under each operating condition of test and asks for arithmetic mean of instantaneous value, the arithmetic mean of instantaneous value of the constant
Asked for by equation below,
Wherein,For the arithmetic mean of instantaneous value of the constant, N is the number of operating condition of test；
S6. poor blowoff limit of the gas-turbine combustion chamber under all other operating condition of test, institute are estimated using poor flame-out expression formula
State poor flame-out expression formula as follows,
Wherein, q 'lboFor the poor blowoff limit estimated；
S7. according to the poor blowoff limit estimated, poor stall threshold of the setting gas turbine under total Test operating mode.
2. the poor stall threshold establishing method of gas turbine safe operation according to claim 1, it is characterised in that the sky
Gas load parameter includes air mass flow, air themperature and air pressure, and the fuel load parameter includes fuel flow rate, fuel temperature
Degree and fuel pressure.
3. the poor stall threshold establishing method of gas turbine safe operation according to claim 2, it is characterised in that step S3
In poor blowoff limit under each operating condition of test obtained by equation below,
Wherein, mfFor fuel flow rate.
4. the poor stall threshold establishing method of gas turbine safe operation according to claim 3, it is characterised in that step S7
Poor stall threshold of the middle gas turbine under total Test operating mode is set by equation below,
qset=Cq 'lbo
Wherein, qsetFor poor stall threshold, C is threshold coefficient, and the span of the threshold coefficient is 1.5~3.0.
5. the poor stall threshold establishing method of gas turbine safe operation according to any one of claim 1-4, it is special
Levy and be, the poor flame-out pilot combustion channel in combustion chamber includes air supply system, fuel feed system, airload parameter and surveyed
Measure instrument, fuel load parameter measurement instrument, full-size combustor, delivery temperature measuring instrumentss and gas extraction system.
6. the poor stall threshold establishing method of gas turbine safe operation according to claim 5, it is characterised in that the sky
Gas load parameter measuring instrumentss and fuel load parameter measurement instrument include flowmeter, thermocouple and pressure transmitter.
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| CN106765339B (en) * | 2015-11-25 | 2021-08-31 | 博西华电器（江苏）有限公司 | Kitchen range and control method thereof |
| CN110736625B (en) * | 2019-10-08 | 2021-07-09 | 中国航发沈阳发动机研究所 | Method for identifying flameout of main combustion chamber of dual-rotor gas turbine engine |
| CN112035969B (en) * | 2020-08-10 | 2024-03-01 | 中国人民解放军海军工程大学 | Method and device for improving low-working-condition flameout characteristic of air-inlet and oil-inlet flame tube |
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Denomination of invention: Safe running poor flameout threshold value setting method of combustion gas turbine Effective date of registration: 20171115 Granted publication date: 20170804 Pledgee: Tsinghua Holdings Co., Ltd. Pledgor: Beijing Huatsing Gas Turbine & IGCC Technology Co., Ltd. Registration number: 2016990000853 |
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